From patchwork Mon Jun 22 11:31:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongjiu Geng X-Patchwork-Id: 1314319 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=huawei.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49r6yX0fBxz9sPF for ; Mon, 22 Jun 2020 21:44:35 +1000 (AEST) Received: from localhost ([::1]:36394 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jnKsL-0007A4-MO for incoming@patchwork.ozlabs.org; Mon, 22 Jun 2020 07:44:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47446) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jnKeq-0004rF-06; Mon, 22 Jun 2020 07:30:36 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:3713 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jnKen-0000F4-2X; Mon, 22 Jun 2020 07:30:35 -0400 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 3CEAEEF0DB6EF6E7C302; Mon, 22 Jun 2020 19:30:23 +0800 (CST) Received: from huawei.com (10.151.151.243) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.487.0; Mon, 22 Jun 2020 19:30:14 +0800 From: Dongjiu Geng To: , , Subject: [PATCH] ACPI: Assert that we don't run out of the preallocated memory Date: Mon, 22 Jun 2020 19:31:46 +0800 Message-ID: <20200622113146.33421-1-gengdongjiu@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.151.151.243] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.190; envelope-from=gengdongjiu@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/22 07:30:24 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: zhengxiang9@huawei.com, qemu-arm@nongnu.org, qemu-devel@nongnu.org, linuxarm@huawei.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" data_length is a constant value, so we use assert instead of condition check. Signed-off-by: Dongjiu Geng Reviewed-by: Michael S. Tsirkin --- 1. Address Peter and Michael's comments to use assert instead of if(). https://lore.kernel.org/qemu-devel/ca79ea28-9ea9-18a5-99ad-25c3eb744721@huawei.com/ --- hw/acpi/ghes.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c index b363bc331d..f0ee9f51ca 100644 --- a/hw/acpi/ghes.c +++ b/hw/acpi/ghes.c @@ -204,16 +204,12 @@ static int acpi_ghes_record_mem_error(uint64_t error_block_address, /* This is the length if adding a new generic error data entry*/ data_length = ACPI_GHES_DATA_LENGTH + ACPI_GHES_MEM_CPER_LENGTH; - /* - * Check whether it will run out of the preallocated memory if adding a new - * generic error data entry + * It should not run out of the preallocated memory if adding a new generic + * error data entry */ - if ((data_length + ACPI_GHES_GESB_SIZE) > ACPI_GHES_MAX_RAW_DATA_LENGTH) { - error_report("Not enough memory to record new CPER!!!"); - g_array_free(block, true); - return -1; - } + assert((data_length + ACPI_GHES_GESB_SIZE) <= + ACPI_GHES_MAX_RAW_DATA_LENGTH); /* Build the new generic error status block header */ acpi_ghes_generic_error_status(block, ACPI_GEBS_UNCORRECTABLE,